package org.libsdl.app;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Hashtable;
import java.lang.reflect.Method;
import java.lang.Math;

import android.app.*;
import android.content.*;
import android.content.res.Configuration;
import android.text.InputType;
import android.view.*;
import android.view.inputmethod.BaseInputConnection;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
import android.view.inputmethod.InputMethodManager;
import android.widget.RelativeLayout;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.os.*;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.SparseArray;
import android.graphics.*;
import android.graphics.drawable.Drawable;
import android.hardware.*;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.ApplicationInfo;

/**
 * SDL Activity
 */
public class SDLActivity extends Activity implements View.OnSystemUiVisibilityChangeListener {
    private static final String TAG = "SDL";

    public static boolean mIsResumedCalled, mIsSurfaceReady, mHasFocus;

    // Cursor types
    private static final int SDL_SYSTEM_CURSOR_NONE = -1;
    private static final int SDL_SYSTEM_CURSOR_ARROW = 0;
    private static final int SDL_SYSTEM_CURSOR_IBEAM = 1;
    private static final int SDL_SYSTEM_CURSOR_WAIT = 2;
    private static final int SDL_SYSTEM_CURSOR_CROSSHAIR = 3;
    private static final int SDL_SYSTEM_CURSOR_WAITARROW = 4;
    private static final int SDL_SYSTEM_CURSOR_SIZENWSE = 5;
    private static final int SDL_SYSTEM_CURSOR_SIZENESW = 6;
    private static final int SDL_SYSTEM_CURSOR_SIZEWE = 7;
    private static final int SDL_SYSTEM_CURSOR_SIZENS = 8;
    private static final int SDL_SYSTEM_CURSOR_SIZEALL = 9;
    private static final int SDL_SYSTEM_CURSOR_NO = 10;
    private static final int SDL_SYSTEM_CURSOR_HAND = 11;

    protected static final int SDL_ORIENTATION_UNKNOWN = 0;
    protected static final int SDL_ORIENTATION_LANDSCAPE = 1;
    protected static final int SDL_ORIENTATION_LANDSCAPE_FLIPPED = 2;
    protected static final int SDL_ORIENTATION_PORTRAIT = 3;
    protected static final int SDL_ORIENTATION_PORTRAIT_FLIPPED = 4;

    protected static int mCurrentOrientation;

    // Handle the state of the native layer
    public enum NativeState {
        INIT, RESUMED, PAUSED
    }

    public static NativeState mNextNativeState;
    public static NativeState mCurrentNativeState;

    public static boolean mExitCalledFromJava;

    /**
     * If shared libraries (e.g. SDL or the native application) could not be loaded.
     */
    public static boolean mBrokenLibraries;

    // If we want to separate mouse and touch events.
    //  This is only toggled in native code when a hint is set!
    public static boolean mSeparateMouseAndTouch;

    // Main components
    protected static SDLActivity mSingleton;
    protected static SDLSurface mSurface;
    protected static View mTextEdit;
    protected static boolean mScreenKeyboardShown;
    protected static ViewGroup mLayout;
    protected static SDLClipboardHandler mClipboardHandler;
    protected static Hashtable<Integer, Object> mCursors;
    protected static int mLastCursorID;
    protected static SDLGenericMotionListener_API12 mMotionListener;
    protected static HIDDeviceManager mHIDDeviceManager;

    // This is what SDL runs in. It invokes SDL_main(), eventually
    protected static Thread mSDLThread;

    protected static SDLGenericMotionListener_API12 getMotionListener() {
        if (mMotionListener == null) {
            if (Build.VERSION.SDK_INT >= 26) {
                mMotionListener = new SDLGenericMotionListener_API26();
            } else if (Build.VERSION.SDK_INT >= 24) {
                mMotionListener = new SDLGenericMotionListener_API24();
            } else {
                mMotionListener = new SDLGenericMotionListener_API12();
            }
        }

        return mMotionListener;
    }

    /**
     * This method returns the name of the shared object with the application entry point
     * It can be overridden by derived classes.
     */
    protected String getMainSharedObject() {
        String library;
        String[] libraries = SDLActivity.mSingleton.getLibraries();
        if (libraries.length > 0) {
            library = "lib" + libraries[libraries.length - 1] + ".so";
        } else {
            library = "libmain.so";
        }
        return getContext().getApplicationInfo().nativeLibraryDir + "/" + library;
    }

    /**
     * This method returns the name of the application entry point
     * It can be overridden by derived classes.
     */
    protected String getMainFunction() {
        return "SDL_main";
    }

    /**
     * This method is called by SDL before loading the native shared libraries.
     * It can be overridden to provide names of shared libraries to be loaded.
     * The default implementation returns the defaults. It never returns null.
     * An array returned by a new implementation must at least contain "SDL2".
     * Also keep in mind that the order the libraries are loaded may matter.
     *
     * @return names of shared libraries to be loaded (e.g. "SDL2", "main").
     */
    protected String[] getLibraries() {
        return new String[]{
                "SDL2",
                // "SDL2_image",
                // "SDL2_mixer",
                // "SDL2_net",
                // "SDL2_ttf",
                "main"
        };
    }

    // Load the .so
    public void loadLibraries() {
        for (String lib : getLibraries()) {
            SDL.loadLibrary(lib);
        }
    }

    /**
     * This method is called by SDL before starting the native application thread.
     * It can be overridden to provide the arguments after the application name.
     * The default implementation returns an empty array. It never returns null.
     *
     * @return arguments for the native application.
     */
    protected String[] getArguments() {
//        String videoPath = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), "SAO-6.mp4").getAbsolutePath();
        String videoPath = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), "qingcun.mp3").getAbsolutePath();
        return new String[]{videoPath};
    }

    public static void initialize() {
        // The static nature of the singleton and Android quirkyness force us to initialize everything here
        // Otherwise, when exiting the app and returning to it, these variables *keep* their pre exit values
        mSingleton = null;
        mSurface = null;
        mTextEdit = null;
        mLayout = null;
        mClipboardHandler = null;
        mCursors = new Hashtable<Integer, Object>();
        mLastCursorID = 0;
        mSDLThread = null;
        mExitCalledFromJava = false;
        mBrokenLibraries = false;
        mIsResumedCalled = false;
        mIsSurfaceReady = false;
        mHasFocus = true;
        mNextNativeState = NativeState.INIT;
        mCurrentNativeState = NativeState.INIT;
    }

    // Setup
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.v(TAG, "Device: " + Build.DEVICE);
        Log.v(TAG, "Model: " + Build.MODEL);
        Log.v(TAG, "onCreate()");
        super.onCreate(savedInstanceState);

        // Load shared libraries
        String errorMsgBrokenLib = "";
        try {
            loadLibraries();
        } catch (UnsatisfiedLinkError e) {
            System.err.println(e.getMessage());
            mBrokenLibraries = true;
            errorMsgBrokenLib = e.getMessage();
        } catch (Exception e) {
            System.err.println(e.getMessage());
            mBrokenLibraries = true;
            errorMsgBrokenLib = e.getMessage();
        }

        if (mBrokenLibraries) {
            mSingleton = this;
            AlertDialog.Builder dlgAlert = new AlertDialog.Builder(this);
            dlgAlert.setMessage("An error occurred while trying to start the application. Please try again and/or reinstall."
                    + System.getProperty("line.separator")
                    + System.getProperty("line.separator")
                    + "Error: " + errorMsgBrokenLib);
            dlgAlert.setTitle("SDL Error");
            dlgAlert.setPositiveButton("Exit",
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int id) {
                            // if this button is clicked, close current activity
                            SDLActivity.mSingleton.finish();
                        }
                    });
            dlgAlert.setCancelable(false);
            dlgAlert.create().show();

            return;
        }

        // Set up JNI
        SDL.setupJNI();

        // Initialize state
        SDL.initialize();

        // So we can call stuff from static callbacks
        mSingleton = this;
        SDL.setContext(this);

        if (Build.VERSION.SDK_INT >= 11) {
            mClipboardHandler = new SDLClipboardHandler_API11();
        } else {
            /* Before API 11, no clipboard notification (eg no SDL_CLIPBOARDUPDATE) */
            mClipboardHandler = new SDLClipboardHandler_Old();
        }

        mHIDDeviceManager = HIDDeviceManager.acquire(this);

        // Set up the surface
        mSurface = new SDLSurface(getApplication());

        mLayout = new RelativeLayout(this);
        mLayout.addView(mSurface);

        // Get our current screen orientation and pass it down.
        mCurrentOrientation = SDLActivity.getCurrentOrientation();
        SDLActivity.onNativeOrientationChanged(mCurrentOrientation);

        setContentView(mLayout);

        setWindowStyle(false);

        getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(this);

        // Get filename from "Open with" of another application
        Intent intent = getIntent();
        if (intent != null && intent.getData() != null) {
            String filename = intent.getData().getPath();
            if (filename != null) {
                Log.v(TAG, "Got filename: " + filename);
                SDLActivity.onNativeDropFile(filename);
            }
        }
    }

    // Events
    @Override
    protected void onPause() {
        Log.v(TAG, "onPause()");
        super.onPause();
        mNextNativeState = NativeState.PAUSED;
        mIsResumedCalled = false;

        if (SDLActivity.mBrokenLibraries) {
            return;
        }

        if (mHIDDeviceManager != null) {
            mHIDDeviceManager.setFrozen(true);
        }

        SDLActivity.handleNativeState();
    }

    @Override
    protected void onResume() {
        Log.v(TAG, "onResume()");
        super.onResume();
        mNextNativeState = NativeState.RESUMED;
        mIsResumedCalled = true;

        if (SDLActivity.mBrokenLibraries) {
            return;
        }

        if (mHIDDeviceManager != null) {
            mHIDDeviceManager.setFrozen(false);
        }

        SDLActivity.handleNativeState();
    }

    public static int getCurrentOrientation() {
        final Context context = SDLActivity.getContext();
        final Display display = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();

        int result = SDL_ORIENTATION_UNKNOWN;

        switch (display.getRotation()) {
            case Surface.ROTATION_0:
                result = SDL_ORIENTATION_PORTRAIT;
                break;

            case Surface.ROTATION_90:
                result = SDL_ORIENTATION_LANDSCAPE;
                break;

            case Surface.ROTATION_180:
                result = SDL_ORIENTATION_PORTRAIT_FLIPPED;
                break;

            case Surface.ROTATION_270:
                result = SDL_ORIENTATION_LANDSCAPE_FLIPPED;
                break;
        }

        return result;
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        Log.v(TAG, "onWindowFocusChanged(): " + hasFocus);

        if (SDLActivity.mBrokenLibraries) {
            return;
        }

        SDLActivity.mHasFocus = hasFocus;
        if (hasFocus) {
            mNextNativeState = NativeState.RESUMED;
            SDLActivity.getMotionListener().reclaimRelativeMouseModeIfNeeded();
        } else {
            mNextNativeState = NativeState.PAUSED;
        }

        SDLActivity.handleNativeState();
    }

    @Override
    public void onLowMemory() {
        Log.v(TAG, "onLowMemory()");
        super.onLowMemory();

        if (SDLActivity.mBrokenLibraries) {
            return;
        }

        SDLActivity.nativeLowMemory();
    }

    @Override
    protected void onDestroy() {
        Log.v(TAG, "onDestroy()");

        if (mHIDDeviceManager != null) {
            HIDDeviceManager.release(mHIDDeviceManager);
            mHIDDeviceManager = null;
        }

        if (SDLActivity.mBrokenLibraries) {
            super.onDestroy();
            // Reset everything in case the user re opens the app
            SDLActivity.initialize();
            return;
        }

        mNextNativeState = NativeState.PAUSED;
        SDLActivity.handleNativeState();

        // Send a quit message to the application
        SDLActivity.mExitCalledFromJava = true;
        SDLActivity.nativeQuit();

        // Now wait for the SDL thread to quit
        if (SDLActivity.mSDLThread != null) {
            try {
                SDLActivity.mSDLThread.join();
            } catch (Exception e) {
                Log.v(TAG, "Problem stopping thread: " + e);
            }
            SDLActivity.mSDLThread = null;

            //Log.v(TAG, "Finished waiting for SDL thread");
        }

        super.onDestroy();

        // Reset everything in case the user re opens the app
        SDLActivity.initialize();
    }

    @Override
    public void onBackPressed() {
        // Check if we want to block the back button in case of mouse right click.
        //
        // If we do, the normal hardware back button will no longer work and people have to use home,
        // but the mouse right click will work.
        //
        String trapBack = SDLActivity.nativeGetHint("SDL_ANDROID_TRAP_BACK_BUTTON");
        if ((trapBack != null) && trapBack.equals("1")) {
            // Exit and let the mouse handler handle this button (if appropriate)
            return;
        }

        // Default system back button behavior.
        super.onBackPressed();
    }

    // Called by JNI from SDL.
    public static void manualBackButton() {
        mSingleton.pressBackButton();
    }

    // Used to get us onto the activity's main thread
    public void pressBackButton() {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                SDLActivity.this.superOnBackPressed();
            }
        });
    }

    // Used to access the system back behavior.
    public void superOnBackPressed() {
        super.onBackPressed();
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {

        if (SDLActivity.mBrokenLibraries) {
            return false;
        }

        int keyCode = event.getKeyCode();
        // Ignore certain special keys so they're handled by Android
        if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN ||
                keyCode == KeyEvent.KEYCODE_VOLUME_UP ||
                keyCode == KeyEvent.KEYCODE_CAMERA ||
                keyCode == KeyEvent.KEYCODE_ZOOM_IN || /* API 11 */
                keyCode == KeyEvent.KEYCODE_ZOOM_OUT /* API 11 */
                ) {
            return false;
        }
        return super.dispatchKeyEvent(event);
    }

    /* Transition to next state */
    public static void handleNativeState() {

        if (mNextNativeState == mCurrentNativeState) {
            // Already in same state, discard.
            return;
        }

        // Try a transition to init state
        if (mNextNativeState == NativeState.INIT) {

            mCurrentNativeState = mNextNativeState;
            return;
        }

        // Try a transition to paused state
        if (mNextNativeState == NativeState.PAUSED) {
            nativePause();
            if (mSurface != null)
                mSurface.handlePause();
            mCurrentNativeState = mNextNativeState;
            return;
        }

        // Try a transition to resumed state
        if (mNextNativeState == NativeState.RESUMED) {
            if (mIsSurfaceReady && mHasFocus && mIsResumedCalled) {
                if (mSDLThread == null) {
                    // This is the entry point to the C app.
                    // Start up the C app thread and enable sensor input for the first time
                    // FIXME: Why aren't we enabling sensor input at start?

                    mSDLThread = new Thread(new SDLMain(), "SDLThread");
                    mSurface.enableSensor(Sensor.TYPE_ACCELEROMETER, true);
                    mSDLThread.start();
                }

                nativeResume();
                mSurface.handleResume();
                mCurrentNativeState = mNextNativeState;
            }
        }
    }

    /* The native thread has finished */
    public static void handleNativeExit() {
        SDLActivity.mSDLThread = null;
        if (mSingleton != null) {
            mSingleton.finish();
        }
    }


    // Messages from the SDLMain thread
    static final int COMMAND_CHANGE_TITLE = 1;
    static final int COMMAND_CHANGE_WINDOW_STYLE = 2;
    static final int COMMAND_TEXTEDIT_HIDE = 3;
    static final int COMMAND_SET_KEEP_SCREEN_ON = 5;

    protected static final int COMMAND_USER = 0x8000;

    protected static boolean mFullscreenModeActive;

    /**
     * This method is called by SDL if SDL did not handle a message itself.
     * This happens if a received message contains an unsupported command.
     * Method can be overwritten to handle Messages in a different class.
     *
     * @param command the command of the message.
     * @param param   the parameter of the message. May be null.
     * @return if the message was handled in overridden method.
     */
    protected boolean onUnhandledMessage(int command, Object param) {
        return false;
    }

    /**
     * A Handler class for Messages from native SDL applications.
     * It uses current Activities as target (e.g. for the title).
     * static to prevent implicit references to enclosing object.
     */
    protected static class SDLCommandHandler extends Handler {
        @Override
        public void handleMessage(Message msg) {
            Context context = SDL.getContext();
            if (context == null) {
                Log.e(TAG, "error handling message, getContext() returned null");
                return;
            }
            switch (msg.arg1) {
                case COMMAND_CHANGE_TITLE:
                    if (context instanceof Activity) {
                        ((Activity) context).setTitle((String) msg.obj);
                    } else {
                        Log.e(TAG, "error handling message, getContext() returned no Activity");
                    }
                    break;
                case COMMAND_CHANGE_WINDOW_STYLE:
                    if (Build.VERSION.SDK_INT < 19) {
                        // This version of Android doesn't support the immersive fullscreen mode
                        break;
                    }
                    if (context instanceof Activity) {
                        Window window = ((Activity) context).getWindow();
                        if (window != null) {
                            if ((msg.obj instanceof Integer) && (((Integer) msg.obj).intValue() != 0)) {
                                int flags = View.SYSTEM_UI_FLAG_FULLSCREEN |
                                        View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                                        View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY |
                                        View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                                        View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                                        View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.INVISIBLE;
                                window.getDecorView().setSystemUiVisibility(flags);
                                window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                                window.clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
                                SDLActivity.mFullscreenModeActive = true;
                            } else {
                                int flags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_VISIBLE;
                                window.getDecorView().setSystemUiVisibility(flags);
                                window.addFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
                                window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
                                SDLActivity.mFullscreenModeActive = false;
                            }
                        }
                    } else {
                        Log.e(TAG, "error handling message, getContext() returned no Activity");
                    }
                    break;
                case COMMAND_TEXTEDIT_HIDE:
                    if (mTextEdit != null) {
                        // Note: On some devices setting view to GONE creates a flicker in landscape.
                        // Setting the View's sizes to 0 is similar to GONE but without the flicker.
                        // The sizes will be set to useful values when the keyboard is shown again.
                        mTextEdit.setLayoutParams(new RelativeLayout.LayoutParams(0, 0));

                        InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
                        imm.hideSoftInputFromWindow(mTextEdit.getWindowToken(), 0);

                        mScreenKeyboardShown = false;
                    }
                    break;
                case COMMAND_SET_KEEP_SCREEN_ON: {
                    if (context instanceof Activity) {
                        Window window = ((Activity) context).getWindow();
                        if (window != null) {
                            if ((msg.obj instanceof Integer) && (((Integer) msg.obj).intValue() != 0)) {
                                window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
                            } else {
                                window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
                            }
                        }
                    }
                    break;
                }
                default:
                    if ((context instanceof SDLActivity) && !((SDLActivity) context).onUnhandledMessage(msg.arg1, msg.obj)) {
                        Log.e(TAG, "error handling message, command is " + msg.arg1);
                    }
            }
        }
    }

    // Handler for the messages
    Handler commandHandler = new SDLCommandHandler();

    // Send a message from the SDLMain thread
    boolean sendCommand(int command, Object data) {
        Message msg = commandHandler.obtainMessage();
        msg.arg1 = command;
        msg.obj = data;
        boolean result = commandHandler.sendMessage(msg);

        if ((Build.VERSION.SDK_INT >= 19) && (command == COMMAND_CHANGE_WINDOW_STYLE)) {
            // Ensure we don't return until the resize has actually happened,
            // or 500ms have passed.

            boolean bShouldWait = false;

            if (data instanceof Integer) {
                // Let's figure out if we're already laid out fullscreen or not.
                Display display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
                DisplayMetrics realMetrics = new DisplayMetrics();
                display.getRealMetrics(realMetrics);

                boolean bFullscreenLayout = ((realMetrics.widthPixels == mSurface.getWidth()) &&
                        (realMetrics.heightPixels == mSurface.getHeight()));

                if (((Integer) data).intValue() == 1) {
                    // If we aren't laid out fullscreen or actively in fullscreen mode already, we're going
                    // to change size and should wait for surfaceChanged() before we return, so the size
                    // is right back in native code.  If we're already laid out fullscreen, though, we're
                    // not going to change size even if we change decor modes, so we shouldn't wait for
                    // surfaceChanged() -- which may not even happen -- and should return immediately.
                    bShouldWait = !bFullscreenLayout;
                } else {
                    // If we're laid out fullscreen (even if the status bar and nav bar are present),
                    // or are actively in fullscreen, we're going to change size and should wait for
                    // surfaceChanged before we return, so the size is right back in native code.
                    bShouldWait = bFullscreenLayout;
                }
            }

            if (bShouldWait) {
                // We'll wait for the surfaceChanged() method, which will notify us
                // when called.  That way, we know our current size is really the
                // size we need, instead of grabbing a size that's still got
                // the navigation and/or status bars before they're hidden.
                //
                // We'll wait for up to half a second, because some devices 
                // take a surprisingly long time for the surface resize, but
                // then we'll just give up and return.
                //
                synchronized (SDLActivity.getContext()) {
                    try {
                        SDLActivity.getContext().wait(500);
                    } catch (InterruptedException ie) {
                        ie.printStackTrace();
                    }
                }
            }
        }

        return result;
    }

    // C functions we call
    public static native int nativeSetupJNI();

    public static native int nativeRunMain(String library, String function, Object arguments);

    public static native void nativeLowMemory();

    public static native void nativeQuit();

    public static native void nativePause();

    public static native void nativeResume();

    public static native void onNativeDropFile(String filename);

    public static native void onNativeResize(int surfaceWidth, int surfaceHeight, int deviceWidth, int deviceHeight, int format, float rate);

    public static native void onNativeKeyDown(int keycode);

    public static native void onNativeKeyUp(int keycode);

    public static native void onNativeKeyboardFocusLost();

    public static native void onNativeMouse(int button, int action, float x, float y, boolean relative);

    public static native void onNativeTouch(int touchDevId, int pointerFingerId,
                                            int action, float x,
                                            float y, float p);

    public static native void onNativeAccel(float x, float y, float z);

    public static native void onNativeClipboardChanged();

    public static native void onNativeSurfaceChanged();

    public static native void onNativeSurfaceDestroyed();

    public static native String nativeGetHint(String name);

    public static native void nativeSetenv(String name, String value);

    public static native void onNativeOrientationChanged(int orientation);

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean setActivityTitle(String title) {
        // Called from SDLMain() thread and can't directly affect the view
        return mSingleton.sendCommand(COMMAND_CHANGE_TITLE, title);
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static void setWindowStyle(boolean fullscreen) {
        // Called from SDLMain() thread and can't directly affect the view
        mSingleton.sendCommand(COMMAND_CHANGE_WINDOW_STYLE, fullscreen ? 1 : 0);
    }

    /**
     * This method is called by SDL using JNI.
     * This is a static method for JNI convenience, it calls a non-static method
     * so that is can be overridden
     */
    public static void setOrientation(int w, int h, boolean resizable, String hint) {
        if (mSingleton != null) {
            mSingleton.setOrientationBis(w, h, resizable, hint);
        }
    }

    /**
     * This can be overridden
     */
    public void setOrientationBis(int w, int h, boolean resizable, String hint) {
        int orientation = -1;

        if (hint.contains("LandscapeRight") && hint.contains("LandscapeLeft")) {
            orientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE;
        } else if (hint.contains("LandscapeRight")) {
            orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
        } else if (hint.contains("LandscapeLeft")) {
            orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
        } else if (hint.contains("Portrait") && hint.contains("PortraitUpsideDown")) {
            orientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT;
        } else if (hint.contains("Portrait")) {
            orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
        } else if (hint.contains("PortraitUpsideDown")) {
            orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
        }

        /* no valid hint */
        if (orientation == -1) {
            if (resizable) {
                /* no fixed orientation */
            } else {
                if (w > h) {
                    orientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE;
                } else {
                    orientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT;
                }
            }
        }

        Log.v("SDL", "setOrientation() orientation=" + orientation + " width=" + w + " height=" + h + " resizable=" + resizable + " hint=" + hint);
        if (orientation != -1) {
            mSingleton.setRequestedOrientation(orientation);
        }
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean isScreenKeyboardShown() {
        if (mTextEdit == null) {
            return false;
        }

        if (!mScreenKeyboardShown) {
            return false;
        }

        InputMethodManager imm = (InputMethodManager) SDL.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        return imm.isAcceptingText();

    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean supportsRelativeMouse() {
        // ChromeOS doesn't provide relative mouse motion via the Android 7 APIs
        if (isChromebook()) {
            return false;
        }

        // DeX mode in Samsung Experience 9.0 and earlier doesn't support relative mice properly under 
        // Android 7 APIs, and simply returns no data under Android 8 APIs.
        //
        // This is fixed in Samsung Experience 9.5, which corresponds to Android 8.1.0, and
        // thus SDK version 27.  If we are in DeX mode and not API 27 or higher, as a result,
        // we should stick to relative mode.
        //
        if ((Build.VERSION.SDK_INT < 27) && isDeXMode()) {
            return false;
        }

        return SDLActivity.getMotionListener().supportsRelativeMouse();
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean setRelativeMouseEnabled(boolean enabled) {
        if (enabled && !supportsRelativeMouse()) {
            return false;
        }

        return SDLActivity.getMotionListener().setRelativeMouseEnabled(enabled);
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean sendMessage(int command, int param) {
        if (mSingleton == null) {
            return false;
        }
        return mSingleton.sendCommand(command, Integer.valueOf(param));
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static Context getContext() {
        return SDL.getContext();
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean isAndroidTV() {
        UiModeManager uiModeManager = (UiModeManager) getContext().getSystemService(UI_MODE_SERVICE);
        if (uiModeManager.getCurrentModeType() == Configuration.UI_MODE_TYPE_TELEVISION) {
            return true;
        }
        if (Build.MANUFACTURER.equals("MINIX") && Build.MODEL.equals("NEO-U1")) {
            return true;
        }
        if (Build.MANUFACTURER.equals("Amlogic") && Build.MODEL.equals("X96-W")) {
            return true;
        }
        return false;
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean isTablet() {
        DisplayMetrics metrics = new DisplayMetrics();
        Activity activity = (Activity) getContext();
        activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);

        double dWidthInches = metrics.widthPixels / (double) metrics.xdpi;
        double dHeightInches = metrics.heightPixels / (double) metrics.ydpi;

        double dDiagonal = Math.sqrt((dWidthInches * dWidthInches) + (dHeightInches * dHeightInches));

        // If our diagonal size is seven inches or greater, we consider ourselves a tablet.
        return (dDiagonal >= 7.0);
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean isChromebook() {
        return getContext().getPackageManager().hasSystemFeature("org.chromium.arc.device_management");
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean isDeXMode() {
        if (Build.VERSION.SDK_INT < 24) {
            return false;
        }
        try {
            final Configuration config = getContext().getResources().getConfiguration();
            final Class configClass = config.getClass();
            return configClass.getField("SEM_DESKTOP_MODE_ENABLED").getInt(configClass)
                    == configClass.getField("semDesktopModeEnabled").getInt(config);
        } catch (Exception ignored) {
            return false;
        }
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static DisplayMetrics getDisplayDPI() {
        return getContext().getResources().getDisplayMetrics();
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean getManifestEnvironmentVariables() {
        try {
            ApplicationInfo applicationInfo = getContext().getPackageManager().getApplicationInfo(getContext().getPackageName(), PackageManager.GET_META_DATA);
            Bundle bundle = applicationInfo.metaData;
            if (bundle == null) {
                return false;
            }
            String prefix = "SDL_ENV.";
            final int trimLength = prefix.length();
            for (String key : bundle.keySet()) {
                if (key.startsWith(prefix)) {
                    String name = key.substring(trimLength);
                    String value = bundle.get(key).toString();
                    nativeSetenv(name, value);
                }
            }
            /* environment variables set! */
            return true;
        } catch (Exception e) {
            Log.v("SDL", "exception " + e.toString());
        }
        return false;
    }

    // This method is called by SDLControllerManager's API 26 Generic Motion Handler.
    public static View getContentView() {
        return mSingleton.mLayout;
    }

    static class ShowTextInputTask implements Runnable {
        /*
         * This is used to regulate the pan&scan method to have some offset from
         * the bottom edge of the input region and the top edge of an input
         * method (soft keyboard)
         */
        static final int HEIGHT_PADDING = 15;

        public int x, y, w, h;

        public ShowTextInputTask(int x, int y, int w, int h) {
            this.x = x;
            this.y = y;
            this.w = w;
            this.h = h;
        }

        @Override
        public void run() {
            RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(w, h + HEIGHT_PADDING);
            params.leftMargin = x;
            params.topMargin = y;

            if (mTextEdit == null) {
                mTextEdit = new DummyEdit(SDL.getContext());

                mLayout.addView(mTextEdit, params);
            } else {
                mTextEdit.setLayoutParams(params);
            }

            mTextEdit.setVisibility(View.VISIBLE);
            mTextEdit.requestFocus();

            InputMethodManager imm = (InputMethodManager) SDL.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.showSoftInput(mTextEdit, 0);

            mScreenKeyboardShown = true;
        }
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean showTextInput(int x, int y, int w, int h) {
        // Transfer the task to the main thread as a Runnable
        return mSingleton.commandHandler.post(new ShowTextInputTask(x, y, w, h));
    }

    public static boolean isTextInputEvent(KeyEvent event) {

        // Key pressed with Ctrl should be sent as SDL_KEYDOWN/SDL_KEYUP and not SDL_TEXTINPUT
        if (Build.VERSION.SDK_INT >= 11) {
            if (event.isCtrlPressed()) {
                return false;
            }
        }

        return event.isPrintingKey() || event.getKeyCode() == KeyEvent.KEYCODE_SPACE;
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static Surface getNativeSurface() {
        if (SDLActivity.mSurface == null) {
            return null;
        }
        return SDLActivity.mSurface.getNativeSurface();
    }

    // Input

    /**
     * This method is called by SDL using JNI.
     *
     * @return an array which may be empty but is never null.
     */
    public static int[] inputGetInputDeviceIds(int sources) {
        int[] ids = InputDevice.getDeviceIds();
        int[] filtered = new int[ids.length];
        int used = 0;
        for (int i = 0; i < ids.length; ++i) {
            InputDevice device = InputDevice.getDevice(ids[i]);
            if ((device != null) && ((device.getSources() & sources) != 0)) {
                filtered[used++] = device.getId();
            }
        }
        return Arrays.copyOf(filtered, used);
    }

    // APK expansion files support

    /**
     * com.android.vending.expansion.zipfile.ZipResourceFile object or null.
     */
    private static Object expansionFile;

    /**
     * com.android.vending.expansion.zipfile.ZipResourceFile's getInputStream() or null.
     */
    private static Method expansionFileMethod;

    /**
     * This method is called by SDL using JNI.
     *
     * @return an InputStream on success or null if no expansion file was used.
     * @throws IOException on errors. Message is set for the SDL error message.
     */
    public static InputStream openAPKExpansionInputStream(String fileName) throws IOException {
        // Get a ZipResourceFile representing a merger of both the main and patch files
        if (expansionFile == null) {
            String mainHint = nativeGetHint("SDL_ANDROID_APK_EXPANSION_MAIN_FILE_VERSION");
            if (mainHint == null) {
                return null; // no expansion use if no main version was set
            }
            String patchHint = nativeGetHint("SDL_ANDROID_APK_EXPANSION_PATCH_FILE_VERSION");
            if (patchHint == null) {
                return null; // no expansion use if no patch version was set
            }

            Integer mainVersion;
            Integer patchVersion;
            try {
                mainVersion = Integer.valueOf(mainHint);
                patchVersion = Integer.valueOf(patchHint);
            } catch (NumberFormatException ex) {
                ex.printStackTrace();
                throw new IOException("No valid file versions set for APK expansion files", ex);
            }

            try {
                // To avoid direct dependency on Google APK expansion library that is
                // not a part of Android SDK we access it using reflection
                expansionFile = Class.forName("com.android.vending.expansion.zipfile.APKExpansionSupport")
                        .getMethod("getAPKExpansionZipFile", Context.class, int.class, int.class)
                        .invoke(null, SDL.getContext(), mainVersion, patchVersion);

                expansionFileMethod = expansionFile.getClass()
                        .getMethod("getInputStream", String.class);
            } catch (Exception ex) {
                ex.printStackTrace();
                expansionFile = null;
                expansionFileMethod = null;
                throw new IOException("Could not access APK expansion support library", ex);
            }
        }

        // Get an input stream for a known file inside the expansion file ZIPs
        InputStream fileStream;
        try {
            fileStream = (InputStream) expansionFileMethod.invoke(expansionFile, fileName);
        } catch (Exception ex) {
            // calling "getInputStream" failed
            ex.printStackTrace();
            throw new IOException("Could not open stream from APK expansion file", ex);
        }

        if (fileStream == null) {
            // calling "getInputStream" was successful but null was returned
            throw new IOException("Could not find path in APK expansion file");
        }

        return fileStream;
    }

    // Messagebox

    /**
     * Result of current messagebox. Also used for blocking the calling thread.
     */
    protected final int[] messageboxSelection = new int[1];

    /**
     * Id of current dialog.
     */
    protected int dialogs = 0;

    /**
     * This method is called by SDL using JNI.
     * Shows the messagebox from UI thread and block calling thread.
     * buttonFlags, buttonIds and buttonTexts must have same length.
     *
     * @param buttonFlags array containing flags for every button.
     * @param buttonIds   array containing id for every button.
     * @param buttonTexts array containing text for every button.
     * @param colors      null for default or array of length 5 containing colors.
     * @return button id or -1.
     */
    public int messageboxShowMessageBox(
            final int flags,
            final String title,
            final String message,
            final int[] buttonFlags,
            final int[] buttonIds,
            final String[] buttonTexts,
            final int[] colors) {

        messageboxSelection[0] = -1;

        // sanity checks

        if ((buttonFlags.length != buttonIds.length) && (buttonIds.length != buttonTexts.length)) {
            return -1; // implementation broken
        }

        // collect arguments for Dialog

        final Bundle args = new Bundle();
        args.putInt("flags", flags);
        args.putString("title", title);
        args.putString("message", message);
        args.putIntArray("buttonFlags", buttonFlags);
        args.putIntArray("buttonIds", buttonIds);
        args.putStringArray("buttonTexts", buttonTexts);
        args.putIntArray("colors", colors);

        // trigger Dialog creation on UI thread

        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                showDialog(dialogs++, args);
            }
        });

        // block the calling thread

        synchronized (messageboxSelection) {
            try {
                messageboxSelection.wait();
            } catch (InterruptedException ex) {
                ex.printStackTrace();
                return -1;
            }
        }

        // return selected value

        return messageboxSelection[0];
    }

    @Override
    protected Dialog onCreateDialog(int ignore, Bundle args) {

        // TODO set values from "flags" to messagebox dialog

        // get colors

        int[] colors = args.getIntArray("colors");
        int backgroundColor;
        int textColor;
        int buttonBorderColor;
        int buttonBackgroundColor;
        int buttonSelectedColor;
        if (colors != null) {
            int i = -1;
            backgroundColor = colors[++i];
            textColor = colors[++i];
            buttonBorderColor = colors[++i];
            buttonBackgroundColor = colors[++i];
            buttonSelectedColor = colors[++i];
        } else {
            backgroundColor = Color.TRANSPARENT;
            textColor = Color.TRANSPARENT;
            buttonBorderColor = Color.TRANSPARENT;
            buttonBackgroundColor = Color.TRANSPARENT;
            buttonSelectedColor = Color.TRANSPARENT;
        }

        // create dialog with title and a listener to wake up calling thread

        final Dialog dialog = new Dialog(this);
        dialog.setTitle(args.getString("title"));
        dialog.setCancelable(false);
        dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
            @Override
            public void onDismiss(DialogInterface unused) {
                synchronized (messageboxSelection) {
                    messageboxSelection.notify();
                }
            }
        });

        // create text

        TextView message = new TextView(this);
        message.setGravity(Gravity.CENTER);
        message.setText(args.getString("message"));
        if (textColor != Color.TRANSPARENT) {
            message.setTextColor(textColor);
        }

        // create buttons

        int[] buttonFlags = args.getIntArray("buttonFlags");
        int[] buttonIds = args.getIntArray("buttonIds");
        String[] buttonTexts = args.getStringArray("buttonTexts");

        final SparseArray<Button> mapping = new SparseArray<Button>();

        LinearLayout buttons = new LinearLayout(this);
        buttons.setOrientation(LinearLayout.HORIZONTAL);
        buttons.setGravity(Gravity.CENTER);
        for (int i = 0; i < buttonTexts.length; ++i) {
            Button button = new Button(this);
            final int id = buttonIds[i];
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    messageboxSelection[0] = id;
                    dialog.dismiss();
                }
            });
            if (buttonFlags[i] != 0) {
                // see SDL_messagebox.h
                if ((buttonFlags[i] & 0x00000001) != 0) {
                    mapping.put(KeyEvent.KEYCODE_ENTER, button);
                }
                if ((buttonFlags[i] & 0x00000002) != 0) {
                    mapping.put(KeyEvent.KEYCODE_ESCAPE, button); /* API 11 */
                }
            }
            button.setText(buttonTexts[i]);
            if (textColor != Color.TRANSPARENT) {
                button.setTextColor(textColor);
            }
            if (buttonBorderColor != Color.TRANSPARENT) {
                // TODO set color for border of messagebox button
            }
            if (buttonBackgroundColor != Color.TRANSPARENT) {
                Drawable drawable = button.getBackground();
                if (drawable == null) {
                    // setting the color this way removes the style
                    button.setBackgroundColor(buttonBackgroundColor);
                } else {
                    // setting the color this way keeps the style (gradient, padding, etc.)
                    drawable.setColorFilter(buttonBackgroundColor, PorterDuff.Mode.MULTIPLY);
                }
            }
            if (buttonSelectedColor != Color.TRANSPARENT) {
                // TODO set color for selected messagebox button
            }
            buttons.addView(button);
        }

        // create content

        LinearLayout content = new LinearLayout(this);
        content.setOrientation(LinearLayout.VERTICAL);
        content.addView(message);
        content.addView(buttons);
        if (backgroundColor != Color.TRANSPARENT) {
            content.setBackgroundColor(backgroundColor);
        }

        // add content to dialog and return

        dialog.setContentView(content);
        dialog.setOnKeyListener(new Dialog.OnKeyListener() {
            @Override
            public boolean onKey(DialogInterface d, int keyCode, KeyEvent event) {
                Button button = mapping.get(keyCode);
                if (button != null) {
                    if (event.getAction() == KeyEvent.ACTION_UP) {
                        button.performClick();
                    }
                    return true; // also for ignored actions
                }
                return false;
            }
        });

        return dialog;
    }

    private final Runnable rehideSystemUi = new Runnable() {
        @Override
        public void run() {
            int flags = View.SYSTEM_UI_FLAG_FULLSCREEN |
                    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY |
                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
                    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
                    View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.INVISIBLE;

            SDLActivity.this.getWindow().getDecorView().setSystemUiVisibility(flags);
        }
    };

    public void onSystemUiVisibilityChange(int visibility) {
        if (SDLActivity.mFullscreenModeActive && (visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0 || (visibility & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) == 0) {

            Handler handler = getWindow().getDecorView().getHandler();
            if (handler != null) {
                handler.removeCallbacks(rehideSystemUi); // Prevent a hide loop.
                handler.postDelayed(rehideSystemUi, 2000);
            }

        }
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean clipboardHasText() {
        return mClipboardHandler.clipboardHasText();
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static String clipboardGetText() {
        return mClipboardHandler.clipboardGetText();
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static void clipboardSetText(String string) {
        mClipboardHandler.clipboardSetText(string);
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static int createCustomCursor(int[] colors, int width, int height, int hotSpotX, int hotSpotY) {
        Bitmap bitmap = Bitmap.createBitmap(colors, width, height, Bitmap.Config.ARGB_8888);
        ++mLastCursorID;
        // This requires API 24, so use reflection to implement this
        try {
            Class PointerIconClass = Class.forName("android.view.PointerIcon");
            Class[] arg_types = new Class[]{Bitmap.class, float.class, float.class};
            Method create = PointerIconClass.getMethod("create", arg_types);
            mCursors.put(mLastCursorID, create.invoke(null, bitmap, hotSpotX, hotSpotY));
        } catch (Exception e) {
            return 0;
        }
        return mLastCursorID;
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean setCustomCursor(int cursorID) {
        // This requires API 24, so use reflection to implement this
        try {
            Class PointerIconClass = Class.forName("android.view.PointerIcon");
            Method setPointerIcon = SDLSurface.class.getMethod("setPointerIcon", PointerIconClass);
            setPointerIcon.invoke(mSurface, mCursors.get(cursorID));
        } catch (Exception e) {
            return false;
        }
        return true;
    }

    /**
     * This method is called by SDL using JNI.
     */
    public static boolean setSystemCursor(int cursorID) {
        int cursor_type = 0; //PointerIcon.TYPE_NULL;
        switch (cursorID) {
            case SDL_SYSTEM_CURSOR_ARROW:
                cursor_type = 1000; //PointerIcon.TYPE_ARROW;
                break;
            case SDL_SYSTEM_CURSOR_IBEAM:
                cursor_type = 1008; //PointerIcon.TYPE_TEXT;
                break;
            case SDL_SYSTEM_CURSOR_WAIT:
                cursor_type = 1004; //PointerIcon.TYPE_WAIT;
                break;
            case SDL_SYSTEM_CURSOR_CROSSHAIR:
                cursor_type = 1007; //PointerIcon.TYPE_CROSSHAIR;
                break;
            case SDL_SYSTEM_CURSOR_WAITARROW:
                cursor_type = 1004; //PointerIcon.TYPE_WAIT;
                break;
            case SDL_SYSTEM_CURSOR_SIZENWSE:
                cursor_type = 1017; //PointerIcon.TYPE_TOP_LEFT_DIAGONAL_DOUBLE_ARROW;
                break;
            case SDL_SYSTEM_CURSOR_SIZENESW:
                cursor_type = 1016; //PointerIcon.TYPE_TOP_RIGHT_DIAGONAL_DOUBLE_ARROW;
                break;
            case SDL_SYSTEM_CURSOR_SIZEWE:
                cursor_type = 1014; //PointerIcon.TYPE_HORIZONTAL_DOUBLE_ARROW;
                break;
            case SDL_SYSTEM_CURSOR_SIZENS:
                cursor_type = 1015; //PointerIcon.TYPE_VERTICAL_DOUBLE_ARROW;
                break;
            case SDL_SYSTEM_CURSOR_SIZEALL:
                cursor_type = 1020; //PointerIcon.TYPE_GRAB;
                break;
            case SDL_SYSTEM_CURSOR_NO:
                cursor_type = 1012; //PointerIcon.TYPE_NO_DROP;
                break;
            case SDL_SYSTEM_CURSOR_HAND:
                cursor_type = 1002; //PointerIcon.TYPE_HAND;
                break;
        }
        // This requires API 24, so use reflection to implement this
        try {
            Class PointerIconClass = Class.forName("android.view.PointerIcon");
            Class[] arg_types = new Class[]{Context.class, int.class};
            Method getSystemIcon = PointerIconClass.getMethod("getSystemIcon", arg_types);
            Method setPointerIcon = SDLSurface.class.getMethod("setPointerIcon", PointerIconClass);
            setPointerIcon.invoke(mSurface, getSystemIcon.invoke(null, SDL.getContext(), cursor_type));
        } catch (Exception e) {
            return false;
        }
        return true;
    }
}

/**
 * Simple runnable to start the SDL application
 */
class SDLMain implements Runnable {
    @Override
    public void run() {
        // Runs SDL_main()
        String library = SDLActivity.mSingleton.getMainSharedObject();
        String function = SDLActivity.mSingleton.getMainFunction();
        String[] arguments = SDLActivity.mSingleton.getArguments();

        Log.v("SDL", "Running main function " + function + " from library " + library);
        SDLActivity.nativeRunMain(library, function, arguments);

        Log.v("SDL", "Finished main function");

        // Native thread has finished, let's finish the Activity
        if (!SDLActivity.mExitCalledFromJava) {
            SDLActivity.handleNativeExit();
        }
    }
}


/**
 * SDLSurface. This is what we draw on, so we need to know when it's created
 * in order to do anything useful.
 * <p>
 * Because of this, that's where we set up the SDL thread
 */
class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
        View.OnKeyListener, View.OnTouchListener, SensorEventListener {

    // Sensors
    protected static SensorManager mSensorManager;
    protected static Display mDisplay;

    // Keep track of the surface size to normalize touch events
    protected static float mWidth, mHeight;

    // Startup
    public SDLSurface(Context context) {
        super(context);
        getHolder().addCallback(this);

        setFocusable(true);
        setFocusableInTouchMode(true);
        requestFocus();
        setOnKeyListener(this);
        setOnTouchListener(this);

        mDisplay = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
        mSensorManager = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);

        if (Build.VERSION.SDK_INT >= 12) {
            setOnGenericMotionListener(SDLActivity.getMotionListener());
        }

        // Some arbitrary defaults to avoid a potential division by zero
        mWidth = 1.0f;
        mHeight = 1.0f;
    }

    public void handlePause() {
        enableSensor(Sensor.TYPE_ACCELEROMETER, false);
    }

    public void handleResume() {
        setFocusable(true);
        setFocusableInTouchMode(true);
        requestFocus();
        setOnKeyListener(this);
        setOnTouchListener(this);
        enableSensor(Sensor.TYPE_ACCELEROMETER, true);
    }

    public Surface getNativeSurface() {
        return getHolder().getSurface();
    }

    // Called when we have a valid drawing surface
    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        Log.v("SDL", "surfaceCreated()");
        holder.setType(SurfaceHolder.SURFACE_TYPE_GPU);
    }

    // Called when we lose the surface
    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.v("SDL", "surfaceDestroyed()");

        // Transition to pause, if needed
        SDLActivity.mNextNativeState = SDLActivity.NativeState.PAUSED;
        SDLActivity.handleNativeState();

        SDLActivity.mIsSurfaceReady = false;
        SDLActivity.onNativeSurfaceDestroyed();
    }

    // Called when the surface is resized
    @Override
    public void surfaceChanged(SurfaceHolder holder,
                               int format, int width, int height) {
        Log.v("SDL", "surfaceChanged()");

        if (SDLActivity.mSingleton == null) {
            return;
        }

        int sdlFormat = 0x15151002; // SDL_PIXELFORMAT_RGB565 by default
        switch (format) {
            case PixelFormat.A_8:
                Log.v("SDL", "pixel format A_8");
                break;
            case PixelFormat.LA_88:
                Log.v("SDL", "pixel format LA_88");
                break;
            case PixelFormat.L_8:
                Log.v("SDL", "pixel format L_8");
                break;
            case PixelFormat.RGBA_4444:
                Log.v("SDL", "pixel format RGBA_4444");
                sdlFormat = 0x15421002; // SDL_PIXELFORMAT_RGBA4444
                break;
            case PixelFormat.RGBA_5551:
                Log.v("SDL", "pixel format RGBA_5551");
                sdlFormat = 0x15441002; // SDL_PIXELFORMAT_RGBA5551
                break;
            case PixelFormat.RGBA_8888:
                Log.v("SDL", "pixel format RGBA_8888");
                sdlFormat = 0x16462004; // SDL_PIXELFORMAT_RGBA8888
                break;
            case PixelFormat.RGBX_8888:
                Log.v("SDL", "pixel format RGBX_8888");
                sdlFormat = 0x16261804; // SDL_PIXELFORMAT_RGBX8888
                break;
            case PixelFormat.RGB_332:
                Log.v("SDL", "pixel format RGB_332");
                sdlFormat = 0x14110801; // SDL_PIXELFORMAT_RGB332
                break;
            case PixelFormat.RGB_565:
                Log.v("SDL", "pixel format RGB_565");
                sdlFormat = 0x15151002; // SDL_PIXELFORMAT_RGB565
                break;
            case PixelFormat.RGB_888:
                Log.v("SDL", "pixel format RGB_888");
                // Not sure this is right, maybe SDL_PIXELFORMAT_RGB24 instead?
                sdlFormat = 0x16161804; // SDL_PIXELFORMAT_RGB888
                break;
            default:
                Log.v("SDL", "pixel format unknown " + format);
                break;
        }

        mWidth = width;
        mHeight = height;
        int nDeviceWidth = width;
        int nDeviceHeight = height;
        try {
            if (Build.VERSION.SDK_INT >= 17) {
                DisplayMetrics realMetrics = new DisplayMetrics();
                mDisplay.getRealMetrics(realMetrics);
                nDeviceWidth = realMetrics.widthPixels;
                nDeviceHeight = realMetrics.heightPixels;
            }
        } catch (Throwable throwable) {
        }

        synchronized (SDLActivity.getContext()) {
            // In case we're waiting on a size change after going fullscreen, send a notification.
            SDLActivity.getContext().notifyAll();
        }

        Log.v("SDL", "Window size: " + width + "x" + height);
        Log.v("SDL", "Device size: " + nDeviceWidth + "x" + nDeviceHeight);
        SDLActivity.onNativeResize(width, height, nDeviceWidth, nDeviceHeight, sdlFormat, mDisplay.getRefreshRate());

        boolean skip = false;
        int requestedOrientation = SDLActivity.mSingleton.getRequestedOrientation();

        if (requestedOrientation == ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED) {
            // Accept any
        } else if (requestedOrientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT || requestedOrientation == ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT) {
            if (mWidth > mHeight) {
                skip = true;
            }
        } else if (requestedOrientation == ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE || requestedOrientation == ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE) {
            if (mWidth < mHeight) {
                skip = true;
            }
        }

        // Special Patch for Square Resolution: Black Berry Passport
        if (skip) {
            double min = Math.min(mWidth, mHeight);
            double max = Math.max(mWidth, mHeight);

            if (max / min < 1.20) {
                Log.v("SDL", "Don't skip on such aspect-ratio. Could be a square resolution.");
                skip = false;
            }
        }

        if (skip) {
            Log.v("SDL", "Skip .. Surface is not ready.");
            SDLActivity.mIsSurfaceReady = false;
            return;
        }

        /* Surface is ready */
        SDLActivity.mIsSurfaceReady = true;

        /* If the surface has been previously destroyed by onNativeSurfaceDestroyed, recreate it here */
        SDLActivity.onNativeSurfaceChanged();

        SDLActivity.handleNativeState();
    }

    // Key events
    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        // Dispatch the different events depending on where they come from
        // Some SOURCE_JOYSTICK, SOURCE_DPAD or SOURCE_GAMEPAD are also SOURCE_KEYBOARD
        // So, we try to process them as JOYSTICK/DPAD/GAMEPAD events first, if that fails we try them as KEYBOARD
        //
        // Furthermore, it's possible a game controller has SOURCE_KEYBOARD and
        // SOURCE_JOYSTICK, while its key events arrive from the keyboard source
        // So, retrieve the device itself and check all of its sources
        if (SDLControllerManager.isDeviceSDLJoystick(event.getDeviceId())) {
            // Note that we process events with specific key codes here
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                if (SDLControllerManager.onNativePadDown(event.getDeviceId(), keyCode) == 0) {
                    return true;
                }
            } else if (event.getAction() == KeyEvent.ACTION_UP) {
                if (SDLControllerManager.onNativePadUp(event.getDeviceId(), keyCode) == 0) {
                    return true;
                }
            }
        }

        if ((event.getSource() & InputDevice.SOURCE_KEYBOARD) != 0) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                //Log.v("SDL", "key down: " + keyCode);
                if (SDLActivity.isTextInputEvent(event)) {
                    SDLInputConnection.nativeCommitText(String.valueOf((char) event.getUnicodeChar()), 1);
                }
                SDLActivity.onNativeKeyDown(keyCode);
                return true;
            } else if (event.getAction() == KeyEvent.ACTION_UP) {
                //Log.v("SDL", "key up: " + keyCode);
                SDLActivity.onNativeKeyUp(keyCode);
                return true;
            }
        }

        if ((event.getSource() & InputDevice.SOURCE_MOUSE) != 0) {
            // on some devices key events are sent for mouse BUTTON_BACK/FORWARD presses
            // they are ignored here because sending them as mouse input to SDL is messy
            if ((keyCode == KeyEvent.KEYCODE_BACK) || (keyCode == KeyEvent.KEYCODE_FORWARD)) {
                switch (event.getAction()) {
                    case KeyEvent.ACTION_DOWN:
                    case KeyEvent.ACTION_UP:
                        // mark the event as handled or it will be handled by system
                        // handling KEYCODE_BACK by system will call onBackPressed()
                        return true;
                }
            }
        }

        return false;
    }

    // Touch events
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        /* Ref: http://developer.android.com/training/gestures/multi.html */
        final int touchDevId = event.getDeviceId();
        final int pointerCount = event.getPointerCount();
        int action = event.getActionMasked();
        int pointerFingerId;
        int mouseButton;
        int i = -1;
        float x, y, p;

        // !!! FIXME: dump this SDK check after 2.0.4 ships and require API14.
        // 12290 = Samsung DeX mode desktop mouse
        if ((event.getSource() == InputDevice.SOURCE_MOUSE || event.getSource() == 12290) && SDLActivity.mSeparateMouseAndTouch) {
            if (Build.VERSION.SDK_INT < 14) {
                mouseButton = 1; // all mouse buttons are the left button
            } else {
                try {
                    mouseButton = (Integer) event.getClass().getMethod("getButtonState").invoke(event);
                } catch (Exception e) {
                    mouseButton = 1;    // oh well.
                }
            }

            // We need to check if we're in relative mouse mode and get the axis offset rather than the x/y values
            // if we are.  We'll leverage our existing mouse motion listener
            SDLGenericMotionListener_API12 motionListener = SDLActivity.getMotionListener();
            x = motionListener.getEventX(event);
            y = motionListener.getEventY(event);

            SDLActivity.onNativeMouse(mouseButton, action, x, y, motionListener.inRelativeMode());
        } else {
            switch (action) {
                case MotionEvent.ACTION_MOVE:
                    for (i = 0; i < pointerCount; i++) {
                        pointerFingerId = event.getPointerId(i);
                        x = event.getX(i) / mWidth;
                        y = event.getY(i) / mHeight;
                        p = event.getPressure(i);
                        if (p > 1.0f) {
                            // may be larger than 1.0f on some devices
                            // see the documentation of getPressure(i)
                            p = 1.0f;
                        }
                        SDLActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);
                    }
                    break;

                case MotionEvent.ACTION_UP:
                case MotionEvent.ACTION_DOWN:
                    // Primary pointer up/down, the index is always zero
                    i = 0;
                case MotionEvent.ACTION_POINTER_UP:
                case MotionEvent.ACTION_POINTER_DOWN:
                    // Non primary pointer up/down
                    if (i == -1) {
                        i = event.getActionIndex();
                    }

                    pointerFingerId = event.getPointerId(i);
                    x = event.getX(i) / mWidth;
                    y = event.getY(i) / mHeight;
                    p = event.getPressure(i);
                    if (p > 1.0f) {
                        // may be larger than 1.0f on some devices
                        // see the documentation of getPressure(i)
                        p = 1.0f;
                    }
                    SDLActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);
                    break;

                case MotionEvent.ACTION_CANCEL:
                    for (i = 0; i < pointerCount; i++) {
                        pointerFingerId = event.getPointerId(i);
                        x = event.getX(i) / mWidth;
                        y = event.getY(i) / mHeight;
                        p = event.getPressure(i);
                        if (p > 1.0f) {
                            // may be larger than 1.0f on some devices
                            // see the documentation of getPressure(i)
                            p = 1.0f;
                        }
                        SDLActivity.onNativeTouch(touchDevId, pointerFingerId, MotionEvent.ACTION_UP, x, y, p);
                    }
                    break;

                default:
                    break;
            }
        }

        return true;
    }

    // Sensor events
    public void enableSensor(int sensortype, boolean enabled) {
        // TODO: This uses getDefaultSensor - what if we have >1 accels?
        if (enabled) {
            mSensorManager.registerListener(this,
                    mSensorManager.getDefaultSensor(sensortype),
                    SensorManager.SENSOR_DELAY_GAME, null);
        } else {
            mSensorManager.unregisterListener(this,
                    mSensorManager.getDefaultSensor(sensortype));
        }
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
        // TODO
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {

            // Since we may have an orientation set, we won't receive onConfigurationChanged events.
            // We thus should check here.
            int newOrientation = SDLActivity.SDL_ORIENTATION_UNKNOWN;

            float x, y;
            switch (mDisplay.getRotation()) {
                case Surface.ROTATION_90:
                    x = -event.values[1];
                    y = event.values[0];
                    newOrientation = SDLActivity.SDL_ORIENTATION_LANDSCAPE;
                    break;
                case Surface.ROTATION_270:
                    x = event.values[1];
                    y = -event.values[0];
                    newOrientation = SDLActivity.SDL_ORIENTATION_LANDSCAPE_FLIPPED;
                    break;
                case Surface.ROTATION_180:
                    x = -event.values[1];
                    y = -event.values[0];
                    newOrientation = SDLActivity.SDL_ORIENTATION_PORTRAIT_FLIPPED;
                    break;
                default:
                    x = event.values[0];
                    y = event.values[1];
                    newOrientation = SDLActivity.SDL_ORIENTATION_PORTRAIT;
                    break;
            }

            if (newOrientation != SDLActivity.mCurrentOrientation) {
                SDLActivity.mCurrentOrientation = newOrientation;
                SDLActivity.onNativeOrientationChanged(newOrientation);
            }

            SDLActivity.onNativeAccel(-x / SensorManager.GRAVITY_EARTH,
                    y / SensorManager.GRAVITY_EARTH,
                    event.values[2] / SensorManager.GRAVITY_EARTH);


        }
    }

    // Captured pointer events for API 26.
    public boolean onCapturedPointerEvent(MotionEvent event) {
        int action = event.getActionMasked();

        float x, y;
        switch (action) {
            case MotionEvent.ACTION_SCROLL:
                x = event.getAxisValue(MotionEvent.AXIS_HSCROLL, 0);
                y = event.getAxisValue(MotionEvent.AXIS_VSCROLL, 0);
                SDLActivity.onNativeMouse(0, action, x, y, false);
                return true;

            case MotionEvent.ACTION_HOVER_MOVE:
            case MotionEvent.ACTION_MOVE:
                x = event.getX(0);
                y = event.getY(0);
                SDLActivity.onNativeMouse(0, action, x, y, true);
                return true;

            case MotionEvent.ACTION_BUTTON_PRESS:
            case MotionEvent.ACTION_BUTTON_RELEASE:

                // Change our action value to what SDL's code expects.
                if (action == MotionEvent.ACTION_BUTTON_PRESS) {
                    action = MotionEvent.ACTION_DOWN;
                } else if (action == MotionEvent.ACTION_BUTTON_RELEASE) {
                    action = MotionEvent.ACTION_UP;
                }

                x = event.getX(0);
                y = event.getY(0);
                int button = event.getButtonState();

                SDLActivity.onNativeMouse(button, action, x, y, true);
                return true;
        }

        return false;
    }

}

/* This is a fake invisible editor view that receives the input and defines the
 * pan&scan region
 */
class DummyEdit extends View implements View.OnKeyListener {
    InputConnection ic;

    public DummyEdit(Context context) {
        super(context);
        setFocusableInTouchMode(true);
        setFocusable(true);
        setOnKeyListener(this);
    }

    @Override
    public boolean onCheckIsTextEditor() {
        return true;
    }

    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        /*
         * This handles the hardware keyboard input
         */
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            if (SDLActivity.isTextInputEvent(event)) {
                ic.commitText(String.valueOf((char) event.getUnicodeChar()), 1);
                return true;
            }
            SDLActivity.onNativeKeyDown(keyCode);
            return true;
        } else if (event.getAction() == KeyEvent.ACTION_UP) {
            SDLActivity.onNativeKeyUp(keyCode);
            return true;
        }
        return false;
    }

    //
    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
        // As seen on StackOverflow: http://stackoverflow.com/questions/7634346/keyboard-hide-event
        // FIXME: Discussion at http://bugzilla.libsdl.org/show_bug.cgi?id=1639
        // FIXME: This is not a 100% effective solution to the problem of detecting if the keyboard is showing or not
        // FIXME: A more effective solution would be to assume our Layout to be RelativeLayout or LinearLayout
        // FIXME: And determine the keyboard presence doing this: http://stackoverflow.com/questions/2150078/how-to-check-visibility-of-software-keyboard-in-android
        // FIXME: An even more effective way would be if Android provided this out of the box, but where would the fun be in that :)
        if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK) {
            if (SDLActivity.mTextEdit != null && SDLActivity.mTextEdit.getVisibility() == View.VISIBLE) {
                SDLActivity.onNativeKeyboardFocusLost();
            }
        }
        return super.onKeyPreIme(keyCode, event);
    }

    @Override
    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
        ic = new SDLInputConnection(this, true);

        outAttrs.inputType = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
        outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI
                | EditorInfo.IME_FLAG_NO_FULLSCREEN /* API 11 */;

        return ic;
    }
}

class SDLInputConnection extends BaseInputConnection {

    public SDLInputConnection(View targetView, boolean fullEditor) {
        super(targetView, fullEditor);

    }

    @Override
    public boolean sendKeyEvent(KeyEvent event) {
        /*
         * This used to handle the keycodes from soft keyboard (and IME-translated input from hardkeyboard)
         * However, as of Ice Cream Sandwich and later, almost all soft keyboard doesn't generate key presses
         * and so we need to generate them ourselves in commitText.  To avoid duplicates on the handful of keys
         * that still do, we empty this out.
         */

        /*
         * Return DOES still generate a key event, however.  So rather than using it as the 'click a button' key
         * as we do with physical keyboards, let's just use it to hide the keyboard.
         */

        if (event.getKeyCode() == KeyEvent.KEYCODE_ENTER) {
            String imeHide = SDLActivity.nativeGetHint("SDL_RETURN_KEY_HIDES_IME");
            if ((imeHide != null) && imeHide.equals("1")) {
                Context c = SDL.getContext();
                if (c instanceof SDLActivity) {
                    SDLActivity activity = (SDLActivity) c;
                    activity.sendCommand(SDLActivity.COMMAND_TEXTEDIT_HIDE, null);
                    return true;
                }
            }
        }


        return super.sendKeyEvent(event);
    }

    @Override
    public boolean commitText(CharSequence text, int newCursorPosition) {

        for (int i = 0; i < text.length(); i++) {
            char c = text.charAt(i);
            nativeGenerateScancodeForUnichar(c);
        }

        SDLInputConnection.nativeCommitText(text.toString(), newCursorPosition);

        return super.commitText(text, newCursorPosition);
    }

    @Override
    public boolean setComposingText(CharSequence text, int newCursorPosition) {

        nativeSetComposingText(text.toString(), newCursorPosition);

        return super.setComposingText(text, newCursorPosition);
    }

    public static native void nativeCommitText(String text, int newCursorPosition);

    public native void nativeGenerateScancodeForUnichar(char c);

    public native void nativeSetComposingText(String text, int newCursorPosition);

    @Override
    public boolean deleteSurroundingText(int beforeLength, int afterLength) {
        // Workaround to capture backspace key. Ref: http://stackoverflow.com/questions/14560344/android-backspace-in-webview-baseinputconnection
        // and https://bugzilla.libsdl.org/show_bug.cgi?id=2265
        if (beforeLength > 0 && afterLength == 0) {
            boolean ret = true;
            // backspace(s)
            while (beforeLength-- > 0) {
                boolean ret_key = sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL))
                        && sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_DEL));
                ret = ret && ret_key;
            }
            return ret;
        }

        return super.deleteSurroundingText(beforeLength, afterLength);
    }
}

interface SDLClipboardHandler {

    public boolean clipboardHasText();

    public String clipboardGetText();

    public void clipboardSetText(String string);

}


class SDLClipboardHandler_API11 implements
        SDLClipboardHandler,
        ClipboardManager.OnPrimaryClipChangedListener {

    protected ClipboardManager mClipMgr;

    SDLClipboardHandler_API11() {
        mClipMgr = (ClipboardManager) SDL.getContext().getSystemService(Context.CLIPBOARD_SERVICE);
        mClipMgr.addPrimaryClipChangedListener(this);
    }

    @Override
    public boolean clipboardHasText() {
        return mClipMgr.hasText();
    }

    @Override
    public String clipboardGetText() {
        CharSequence text;
        text = mClipMgr.getText();
        if (text != null) {
            return text.toString();
        }
        return null;
    }

    @Override
    public void clipboardSetText(String string) {
        mClipMgr.removePrimaryClipChangedListener(this);
        mClipMgr.setText(string);
        mClipMgr.addPrimaryClipChangedListener(this);
    }

    @Override
    public void onPrimaryClipChanged() {
        SDLActivity.onNativeClipboardChanged();
    }

}

class SDLClipboardHandler_Old implements
        SDLClipboardHandler {

    protected android.text.ClipboardManager mClipMgrOld;

    SDLClipboardHandler_Old() {
        mClipMgrOld = (android.text.ClipboardManager) SDL.getContext().getSystemService(Context.CLIPBOARD_SERVICE);
    }

    @Override
    public boolean clipboardHasText() {
        return mClipMgrOld.hasText();
    }

    @Override
    public String clipboardGetText() {
        CharSequence text;
        text = mClipMgrOld.getText();
        if (text != null) {
            return text.toString();
        }
        return null;
    }

    @Override
    public void clipboardSetText(String string) {
        mClipMgrOld.setText(string);
    }
}

